2004
DOI: 10.1109/tim.2004.831459
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A Reusable Smart Interface for Gas Sensor Resistance Measurement

Abstract: Abstract-The advances of the semiconductor industry enable microelectromechanical systems sensors, signal conditioning logic and network access to be integrated into a smart sensor node. In this framework, a mixed-mode interface circuit for monolithically integrated gas sensor arrays was developed with high-level design techniques. This interface system includes analog electronics for inspection of up to four sensor arrays and digital logic for smart control and data communication. Although different design me… Show more

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Cited by 29 publications
(6 citation statements)
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References 17 publications
(19 reference statements)
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“…A PWM-based interface ASIC consisted of a ring-oscillator formed by a chain of three inverter stages and an RC delay stage formed by a chemiresistive sensor and an external capacitor. Thus, the output frequency of the oscillator corresponded with the resistance value of the sensor [ 163 ]. A wide-dynamic-range interface circuit as shown in Figure 7 was based on another resistance-to-frequency conversion, and the sensor resistor determined the charged and discharged currents, thus dominating the frequency.…”
Section: Interface Of the Chemiresistive Sensorsmentioning
confidence: 99%
“…A PWM-based interface ASIC consisted of a ring-oscillator formed by a chain of three inverter stages and an RC delay stage formed by a chemiresistive sensor and an external capacitor. Thus, the output frequency of the oscillator corresponded with the resistance value of the sensor [ 163 ]. A wide-dynamic-range interface circuit as shown in Figure 7 was based on another resistance-to-frequency conversion, and the sensor resistor determined the charged and discharged currents, thus dominating the frequency.…”
Section: Interface Of the Chemiresistive Sensorsmentioning
confidence: 99%
“…The sensor shield was developed by considering that a good choice to perform real time resistance measurements is to employ an oscillator circuit whose frequency is resistance value dependent [3]. This approach avoids use of A/D converters and simplifies the interfacing circuit of the sensor.…”
Section: Measurement System Developmentmentioning
confidence: 99%
“…With the timely advent of Internet of Things (IOT), these sensors can now be coupled with microcontrollers, wireless sensor networks to establish seamless machine to machine communication (8)(9)(10)(11)(12) and cloud storage systems to create a smart sensing ecosystem to detect and quantify hydrogen leaks on a real time basis, thus resulting in the elimination the chances of a catastrophe and also provides concrete data that can be analyzed from anywhere in the globe (13)(14)(15)(16)(17)(18)(19)(20). A typical hydrogen sensing system consists of a signal conditioning unit, analog to digital converter, a microcontroller, a wireless communication system for both sending alerts to the user and for communication of sensor data, a data logging and analysis system, and a data display system and alarm system (22)(23)(24)(25).…”
Section: Introductionmentioning
confidence: 99%